The semi-hermetic compressor is totally different in its construction than the hennetic; this can be seen in Fig. 3-9. The compressor is constructed of a heavy casting. It is bulky and heavy to handle due to the iron content in its body. You will notice that this compressor has nuts and bolts holding it together. This advantage allows the unit to be re-built on a job site. It too has a drive motor (electric) that turns the parts of the reciprocal compressor. Not many of these compressors will be found in residential applications, yet there can be some larger homes or estates that use this kind. Many light commercial applications also use this type of compressor.